In case you’re worried about a Zombie Apocalypse in 2015, a man named Ivan Owen figured out how to build a flame thrower using nothing but a battery-powered leaf blower, corn starch as fuel, and a blow torch. There is a catch, however: A lot of the parts he used to make the inflammatory device were constructed using a 3D printer. It’s a pretty badass DIY creation, but probably something you shouldn’t try at home.